Project summary
Our first Passivhaus principal scheme, spread across two neighbouring infill sites in Feltham. The new homes will provide a test case for Sapphire to determine the benefits (reduced fuel bills, resident satisfaction, stable temperature, moisture reduction) prior to rolling out mass delivery of Zero Carbon new homes by 2025.
We have managed this project using our Passivhaus Project Tracker, incorporating all design, modelling and air testing requirements into contractor design and installation periods. Using this process, the Helix team has successfully delivered the challenging air tightness requirements.
- CustomerSapphire Independent Housing and London Borough of Hounslow
- Employers AgentPotter Raper
- Project Value£4.3m
- Tenure14 affordable homes
Key features
- Traditional Build delivered to Passivhaus Principles
- Net Zero Carbon
- Delivered as full turnkey under a JCT D&B 2016 Contract
- Helix Construct were Main Contractor
- Fabric First Design
- NDSS Compliant
- ASHP, MVHR, Solar PV (no Gas)
- 600mm thick walls
- Building orientation maximises southern solar gains
- Window sizes proportional to their orientation
- Rationalised to minimise heat losses
- Edge of conservation area, local green space and Green Belt
Intelligent building
Experienced homes builders delivering sustainable, efficient homes fit for future generations.
Working with funds, Registered Providers and Homes England to secure land and deliver homes.
